LED key chain light with compass: The item uses super bright LED as source of light, LED colors in white, red, blue, green, amber, pink or UV. UV light can be used as money tester. Sensitive compass. Large area in diameter 2cm for imprinting logo. 1C logo is free of charge, additional colors upon order quantity. Powered by 3 pieces of batteries AG10 (LR1130) . Unit size: 19x25x50mm (length 100mm with ring) .